Nano Materials Science最新文献_第3页

Covalent organic frameworks/carbon nanotubes composite with cobalt(II) pyrimidine sites for bifunctional oxygen electrocatalysis 具有钴(II)嘧啶位点的共价有机框架/碳纳米管复合材料用于双功能氧电催化

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-08-01 DOI: 10.1016/j.nanoms.2023.10.002

{"title":"Covalent organic frameworks/carbon nanotubes composite with cobalt(II) pyrimidine sites for bifunctional oxygen electrocatalysis","authors":"","doi":"10.1016/j.nanoms.2023.10.002","DOIUrl":"10.1016/j.nanoms.2023.10.002","url":null,"abstract":"<div>With characteristics and advantages of functional composite materials, they are commendably adopted in numerous fields especially in oxygen electrocatalysis, which is due to the significant synergies between various components. Herein, a novel bifunctional oxygen electrocatalyst (Co-CNT@COF-Pyr) has been synthesized through in-situ growth of covalent organic frameworks (COFs) layers on the outer surface of highly conductive carbon nanotubes (CNTs) followed by coordination with Co(Ⅱ). For electrocatalytic OER, Co-CNT@COF-Pyr reveals a low overpotential (438 mV) in alkaline electrolyte (1.0 M aqueous solution of KOH) with a current density of 10 mA cm−2, which is comparable to most discovered COF-based catalysts. For electrocatalytic ORR, Co-CNT@COF-Pyr exhibits a low H2O2 yield range (9.0 %–10.1 %) and a reaction pathway close to 4e− (n = 3.82–3.80) in alkaline electrolyte (0.1 M aqueous solution of KOH) within the test potential range of 0.1–0.6 V vs. RHE, which is superior to most reported COF-based catalysts. Hence, this research could not only offer an innovative insight into the construction of composites, but also facilitate the practical application of renewable fuel cells, closed water cycle, and rechargeable metal-air batteries.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 4","pages":"Pages 419-427"},"PeriodicalIF":9.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000636/pdfft?md5=538c5b83327b1bbe3d623a36a5742ca5&pid=1-s2.0-S2589965123000636-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanomaterial-assisted wearable glucose biosensors for noninvasive real-time monitoring: Pioneering point-of-care and beyond 用于无创实时监测的纳米材料辅助可穿戴葡萄糖生物传感器：开拓护理点及其他领域

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.11.009

Moein Safarkhani , Abdullah Aldhaher , Golnaz Heidari , Ehsan Nazarzadeh Zare , Majid Ebrahimi Warkiani , Omid Akhavan , YunSuk Huh , Navid Rabiee

{"title":"Nanomaterial-assisted wearable glucose biosensors for noninvasive real-time monitoring: Pioneering point-of-care and beyond","authors":"Moein Safarkhani , Abdullah Aldhaher , Golnaz Heidari , Ehsan Nazarzadeh Zare , Majid Ebrahimi Warkiani , Omid Akhavan , YunSuk Huh , Navid Rabiee","doi":"10.1016/j.nanoms.2023.11.009","DOIUrl":"10.1016/j.nanoms.2023.11.009","url":null,"abstract":"<div>This review explores glucose monitoring and management strategies, emphasizing the need for reliable and user-friendly wearable sensors that are the next generation of sensors for continuous glucose detection. In addition, examines key strategies for designing glucose sensors that are multi-functional, reliable, and cost-effective in a variety of contexts. The unique features of effective diabetes management technology are highlighted, with a focus on using nano/biosensor devices that can quickly and accurately detect glucose levels in the blood, improving patient treatment and control of potential diabetes-related infections. The potential of next-generation wearable and touch-sensitive nano biomedical sensor engineering designs for providing full control in assessing implantable, continuous glucose monitoring is also explored. The challenges of standardizing drug or insulin delivery doses, low-cost, real-time detection of increased blood sugar levels in diabetics, and early digital health awareness controls for the adverse effects of injectable medication are identified as unmet needs. Also, the market for biosensors is expected to expand significantly due to the rising need for portable diagnostic equipment and an ever-increasing diabetic population. The paper concludes by emphasizing the need for further research and development of glucose biosensors to meet the stringent requirements for sensitivity and specificity imposed by clinical diagnostics while being cost-effective, stable, and durable.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 263-283"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000776/pdfft?md5=70e03351df3897df9d1f74ba3ec60494&pid=1-s2.0-S2589965123000776-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-temperature replacement construction of three-dimensional corrosion-resistant interface for deeply rechargeable Zn metal batteries 用于深度可充电锌金属电池的三维抗腐蚀界面的低温置换结构

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.11.004

Jinze Li , Daniel Röhrens , Gianluca Dalfollo , Xiaochao Wu , Ziheng Lu , Qiang Gao , Bo Han , Ruimin Sun , Chenggang Zhou , Jindi Wang , Zhao Cai

{"title":"Low-temperature replacement construction of three-dimensional corrosion-resistant interface for deeply rechargeable Zn metal batteries","authors":"Jinze Li , Daniel Röhrens , Gianluca Dalfollo , Xiaochao Wu , Ziheng Lu , Qiang Gao , Bo Han , Ruimin Sun , Chenggang Zhou , Jindi Wang , Zhao Cai","doi":"10.1016/j.nanoms.2023.11.004","DOIUrl":"10.1016/j.nanoms.2023.11.004","url":null,"abstract":"<div>Aqueous Zn batteries are promising candidates for grid-scale renewable energy storage. Foil electrodes have been widely investigated and applied as anode materials for aqueous Zn batteries, however, they suffer from limited surface area and severe interfacial issues including metallic dendrites and corrosion side reactions, limiting the depth of discharge (DOD) of the foil electrode materials. Herein, a low-temperature replacement reaction is utilized to in-situ construct a three-dimensional (3D) corrosion-resistant interface for deeply rechargeable Zn foil electrodes. Specifically, the deliberate low-temperature environment controlled the replacement rate between polycrystalline Zn metal and oxalic acid, producing a Zn foil electrode with distinct 3D corrosion-resistant interface (3DCI-Zn), which differed from conventional two-dimensional (2D) protective structure and showed an order of magnitude higher surface area. Consequently, the 3DCI-Zn electrode exhibited dendrite-free and anti-corrosion properties, and achieved stable plating/stripping performance for 1000 h at 10 mA cm−2 and 10 mAh cm−2 with a remarkable DOD of 79 %. After pairing with a MnO2 cathode with a high areal capacity of 4.2 mAh cm−2, the pouch cells delivered 168 Wh L−1 and a capacity retention of 89.7 % after 100 cycles with a low negative/positive (N/P) ratio of 3:1.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 329-336"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000727/pdfft?md5=595a80a21077e98df5762f52e5a748e2&pid=1-s2.0-S2589965123000727-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controllable large-scale processing of temperature regulating sheath-core fibers with high-enthalpy for thermal management 热管理用高焓调温护芯纤维的可控大规模加工

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.10.004

Ziye Chen , Zexu Hu , Shining Chen , Senlong Yu , Liping Zhu , Hengxue Xiang , Meifang Zhu

{"title":"Controllable large-scale processing of temperature regulating sheath-core fibers with high-enthalpy for thermal management","authors":"Ziye Chen , Zexu Hu , Shining Chen , Senlong Yu , Liping Zhu , Hengxue Xiang , Meifang Zhu","doi":"10.1016/j.nanoms.2023.10.004","DOIUrl":"10.1016/j.nanoms.2023.10.004","url":null,"abstract":"<div>Temperature regulating fibers (TRFs) with high enthalpy and high form stability are the key factors for thermal management. However, the enthalpies of most TRFs are not high, and the preparation methods are still at the laboratory scale. It remains a great challenge to use industrial spinning equipment to achieve continuous processing of TRFs with excellent thermal and mechanical properties. Here, polyamide 6 (PA6) based TRFs with a sheath-core structure were prepared by bicomponent melt-spinning. The sheath-core TRF (TRFsc) are composed of PA6 as sheath and functional PA6 as core, which are filled with the shape stable phase change materials (ssPCM), dendritic silica@polyethylene glycol (SiO2@PEG). With the aid of the sheath structure, the filling content of SiO2@PEG can reach 30 %, so that the enthalpy of the TRFs can be as high as 21.3 J/g. The ultra-high enthalpy guarantees the temperature regulation ability during the alternating process of cooling and heating. In hot environment, the temperature regulation time is 6.59 min, and the temperature difference is 12.93 °C. In addition, the mechanical strength of the prepared TRFsc reaches 2.26 cN/dtex, which can fully meet its application in the field of thermal management textiles and devices to manage the temperature regulation of the human body or precision equipment, etc.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 337-344"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258996512300065X/pdfft?md5=d91f01a1e13bd7bb3d0bcd209934eae3&pid=1-s2.0-S258996512300065X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-atom photo-catalysts: Synthesis, characterization, and applications 单原子光催化剂:合成、表征及应用

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.11.001

Siqi Li , Ziwang Kan , He Wang , Jiaxiao Bai , Yunyi Liu , Song Liu , Yingjie Wu

{"title":"Single-atom photo-catalysts: Synthesis, characterization, and applications","authors":"Siqi Li , Ziwang Kan , He Wang , Jiaxiao Bai , Yunyi Liu , Song Liu , Yingjie Wu","doi":"10.1016/j.nanoms.2023.11.001","DOIUrl":"10.1016/j.nanoms.2023.11.001","url":null,"abstract":"<div>Single-atom catalysts (SACs) are gaining popularity in catalytic reactions due to their nearly 100 % atomic utilization and defined active sites, which provide great convenience for studying the catalytic mechanism of catalysts. However, SACs still present challenges such as complex formation processes, low loading and easy agglomeration of catalysts. Herein, we systematically discuss the synthesis methods for SACs, including co-precipitation, impregnation, atomic layer deposition, pyrolysis and Anti-Ostwald ripening etc. Various techniques for characterizing single-atom catalysts (SACs) are described in detail. The utilization of individual atoms in various photocatalytic reactions and their mechanisms of action in different reactions are explained. The purpose of this review is to introduce single-atom synthesis methods, characterization techniques, specific catalytic action and their applications in the direction of photocatalysis, and to provide a reference for the industrialization of photocatalytic single-atoms, which is currently impossible, in the hope of promoting further development of photocatalytic single-atoms.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 284-304"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000697/pdfft?md5=a66013e8c783352fae83c067da3f2703&pid=1-s2.0-S2589965123000697-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel “Snowflake”--rGO-CuO for ultrasonic degradation of rhodamine and methyl orange 一种新型“雪花”——rGO-CuO用于超声降解罗丹明和甲基橙

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.10.007

Yitong Wang , Yuhua Wang , Zuzhao Xiong , Xifei Li

{"title":"A novel “Snowflake”--rGO-CuO for ultrasonic degradation of rhodamine and methyl orange","authors":"Yitong Wang , Yuhua Wang , Zuzhao Xiong , Xifei Li","doi":"10.1016/j.nanoms.2023.10.007","DOIUrl":"10.1016/j.nanoms.2023.10.007","url":null,"abstract":"<div>Graphene-doped CuO (rGO-CuO) nanocomposites with flower shapes were prepared by an improved solvothermal method. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy and UV–visible spectroscopy. The active species in the degradation reaction of rGO-CuO composites under ultrasonic irradiation were detected by electron paramagnetic resonance. On the basis of comparative experiments, the photodegradation mechanisms of two typical dyes, Rhodamine B (Rh B) and methyl orange (MO), were proposed. The results demonstrated that the doped CuO could improve the degradation efficiency. The catalytic degradation efficiency of rGO-CuO (2:1) to rhodamine B (RhB) and methyl orange (MO) reached 90 % and 87 % respectively, which were 2.1 times and 4.4 times of the reduced graphene oxide. Through the first-principles and other theories, we give the reasons for the enhanced catalytic performance of rGO-CuO: combined with internal and external factors, rGO-CuO under ultrasound could produce more hole and active sites that could interact with the OH· in pollutant molecules to achieve degradation. The rGO-CuO nanocomposite has a simple preparation process and low price, and has a high efficiency of degrading water pollution products and no secondary pollution products. It has a low-cost and high-efficiency application prospect in water pollution industrial production and life.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 365-373"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000685/pdfft?md5=7c2f2a93495ff485e2f481625b2b7184&pid=1-s2.0-S2589965123000685-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and computational study of annealed nickel sulfide quantum dots for catalytic and antibacterial activity 退火硫化镍量子点催化和抗菌活性的实验与计算研究

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.11.007

Muhammad Ikram , Sawaira Moeen , Ali Haider , Anwar Ul-Hamid , Haya Alhummiany , Hamoud H. Somaily , Souraya Goumri-Said , Mohammed Benali Kanoun

{"title":"Experimental and computational study of annealed nickel sulfide quantum dots for catalytic and antibacterial activity","authors":"Muhammad Ikram , Sawaira Moeen , Ali Haider , Anwar Ul-Hamid , Haya Alhummiany , Hamoud H. Somaily , Souraya Goumri-Said , Mohammed Benali Kanoun","doi":"10.1016/j.nanoms.2023.11.007","DOIUrl":"10.1016/j.nanoms.2023.11.007","url":null,"abstract":"<div>This research investigates the hydrothermal synthesis and annealing duration effects on nickel sulfide (NiS2) quantum dots (QDs) for catalytic decolorization of methylene blue (MB) dye and antimicrobial efficacy. QD size increased with longer annealing, reducing catalytic activity. UV–vis, XRD, TEM, and FTIR analyses probed optical, structural, morphological, and vibrational features. XRD confirmed NiS2's anorthic structure, with crystallite size growing from 6.53 to 7.81 nm during extended annealing. UV–Vis exhibited a bathochromic shift, reflecting reduced band gap energy (Eg) in NiS2. TEM revealed NiS2 QD formation, with agglomerated QD average size increasing from 7.13 to 9.65 nm with prolonged annealing. Pure NiS2 showed significant MB decolorization (89.85%) in acidic conditions. Annealed NiS2 QDs demonstrated notable antibacterial activity, yielding a 6.15 mm inhibition zone against Escherichia coli (E. coli) compared to Ciprofloxacin. First-principles computations supported a robust interaction between MB and NiS2, evidenced by obtained adsorption energies. This study highlights the nuanced relationship between annealing duration, structural changes, and functional properties in NiS2 QDs, emphasizing their potential applications in catalysis and antibacterial interventions.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 355-364"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000752/pdfft?md5=0bd8d5aeed3cba89e18c8ba3f946129d&pid=1-s2.0-S2589965123000752-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extrusion 3D printing of carbon nanotube-assembled carbon aerogel nanocomposites with high electrical conductivity 挤压三维打印具有高导电性的碳纳米管组装碳气凝胶纳米复合材料

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.09.002

Lukai Wang, Jing Men, Junzong Feng, Yonggang Jiang, Liangjun Li, Yijie Hu, Jian Feng

{"title":"Extrusion 3D printing of carbon nanotube-assembled carbon aerogel nanocomposites with high electrical conductivity","authors":"Lukai Wang, Jing Men, Junzong Feng, Yonggang Jiang, Liangjun Li, Yijie Hu, Jian Feng","doi":"10.1016/j.nanoms.2023.09.002","DOIUrl":"10.1016/j.nanoms.2023.09.002","url":null,"abstract":"<div>Carbon nanotubes (CNTs) with high aspect ratio and excellent electrical conduction offer huge functional improvements for current carbon aerogels. However, there remains a major challenge for achieving the on-demand shaping of carbon aerogels with tailored micro-nano structural textures and geometric features. Herein, a facile extrusion 3D printing strategy has been proposed for fabricating CNT-assembled carbon (CNT/C) aerogel nanocomposites through the extrusion printing of pseudoplastic carbomer-based inks, in which the stable dispersion of CNT nanofibers has been achieved relying on the high viscosity of carbomer microgels. After extrusion printing, the chemical solidification through polymerizing RF sols enables 3D-printed aerogel nanocomposites to display high shape fidelity in macroscopic geometries. Benefiting from the micro-nano scale assembly of CNT nanofiber networks and carbon nanoparticle networks in composite phases, 3D-printed CNT/C aerogels exhibit enhanced mechanical strength (fracture strength, 0.79 MPa) and typical porous structure characteristics, including low density (0.220 g cm−3), high surface area (298.4 m2 g−1), and concentrated pore diameter distribution (∼32.8 nm). More importantly, CNT nanofibers provide an efficient electron transport pathway, imparting 3D-printed CNT/C aerogel composites with a high electrical conductivity of 1.49 S cm−1. Our work would offer feasible guidelines for the design and fabrication of shape-dominated functional materials by additive manufacturing.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 312-319"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000375/pdfft?md5=a31d266a0374ab469938dad66cc3b4d6&pid=1-s2.0-S2589965123000375-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134994572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strengthening-softening transition and maximum strength in Schwarz nanocrystals 施瓦茨纳米晶体的强化-软化转变和最大强度

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.09.006

Hanzheng Xing , Jiaxi Jiang , Yujia Wang , Yongpan Zeng , Xiaoyan Li

{"title":"Strengthening-softening transition and maximum strength in Schwarz nanocrystals","authors":"Hanzheng Xing , Jiaxi Jiang , Yujia Wang , Yongpan Zeng , Xiaoyan Li","doi":"10.1016/j.nanoms.2023.09.006","DOIUrl":"10.1016/j.nanoms.2023.09.006","url":null,"abstract":"<div>Recently, a Schwarz crystal structure with curved grain boundaries (GBs) constrained by twin-boundary (TB) networks was discovered in nanocrystalline Cu through experiments and atomistic simulations. Nanocrystalline Cu with nanosized Schwarz crystals exhibited high strength and excellent thermal stability. However, the grain-size effect and associated deformation mechanisms of Schwarz nanocrystals remain unknown. Here, we performed large-scale atomistic simulations to investigate the deformation behaviors and grain-size effect of nanocrystalline Cu with Schwarz crystals. Our simulations showed that similar to regular nanocrystals, Schwarz nanocrystals exhibit a strengthening-softening transition with decreasing grain size. The critical grain size in Schwarz nanocrystals is smaller than that in regular nanocrystals, leading to a maximum strength higher than that of regular nanocrystals. Our simulations revealed that the softening in Schwarz nanocrystals mainly originates from TB migration (or detwinning) and annihilation of GBs, rather than GB-mediated processes (including GB migration, sliding and diffusion) dominating the softening in regular nanocrystals. Quantitative analyses of simulation data further showed that compared with those in regular nanocrystals, the GB-mediated processes in Schwarz nanocrystals are suppressed, which is related to the low volume fraction of amorphous-like GBs and constraints of TB networks. The smaller critical grain size arises from the suppression of GB-mediated processes.</div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"6 3","pages":"Pages 320-328"},"PeriodicalIF":9.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589965123000417/pdfft?md5=ce399eb35ebb4616780ee4e6103e15fb&pid=1-s2.0-S2589965123000417-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CuO–TiO2 based self-powered broad band photodetector CuO-TiO2基自供电宽带光电探测器

IF 9.9 2区材料科学

Nano Materials Science Pub Date : 2024-06-01 DOI: 10.1016/j.nanoms.2023.11.003

Chiranjib Ghosh , Arka Dey , Iman Biswas , Rajeev Kumar Gupta , Vikram Singh Yadav , Ashish Yadav , Neha Yadav , Hongyu Zheng , Mohamed Henini , Aniruddha Mondal

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